Table 1.

Results of the phylogenetic generalized least-square models testing the strength of the phylogenetic signal (λ) for various Y parameters plotted against body mass (logY = α + β logBM, with BM in g). (Best-fitting models occur where log-likelihood (Lh) is maximal. The allometric exponent (β) and coefficient (α) and their standard error (s.e.) are reported for various Lh and λ values. The proportion of the variance explained is indicated (r²). λ estimations were found to be 0 (as in ordinary least-square regressions). Figures in brackets indicate λ values forced to be equal to 1 (as in independent contrast analyses). LEVD and HEVD refer to two different primate databases for estimating energy input (Material and methods; electronic supplementary material, notes S2 and S4).)

Y	Lh	α	s.e. (α)	β	s.e. (β)	r2	λ
wet matter intake, g d−1
non-human and human (n = 15)	−6.309	−0.312	0.996	0.832	0.242	0.44	[1]
	4.345	0.106	0.259	0.727	0.065	0.89	0
non-human (n = 14)	−5.367	0.151	0.987	0.717	0.240	0.39	[1]
	6.463	−0.046	0.225	0.774	0.057	0.93	0
dry matter intake, g d−1
non-human (n = 20)	2.766	−0.761	0.520	0.822	0.129	0.67	[1]
	13.185	−0.467	0.163	0.740	0.042	0.94	0
daily energy input
LEVD, kJ d−1	1.396	−0.151	0.576	0.896	0.137	0.72	[1]
non-human (n = 17)	14.084	0.412	0.138	0.749	0.035	0.96	0
HEVD, kJ d−1	4.772	0.406	0.592	0.779	0.145	0.72	[1]
non-human (n = 11)	12.731	0.683	0.146	0.703	0.037	0.97	0